twardowsky



Dec. 4 1923. 1,476,383

J. TWARDOWSKY CE EEEEEE VE Wg. j',

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with a contour somewhat smaller than the adjacent bore et the duid-receiving chamber and having an edge portion adapted to eat tlatwise on the disch arge end o the cyll l also provide spring means eoniinueusi tending to seat this cylinder head er ralre member7 and make the lat-ter out of' resilient material adapted to be exed by pressure differences between its opposite faces so as to alter its diametrical cross etioin and I desirably torni the Central portion of this movable valve member so to retard the alteration in cross section in the middle portion of the member.

For example, Fig. l shows a pressor having a piston l slidable .der 2 which has its rear end cui oil square to aford an annular shoulder 3. Surrounding this annular shoulder is the annular flange 4; of a luid-receivingl chamber 5. he flange l being bolted to a. corresponding flange 6 on the rear ond oi the cylinder. Within the fluid-receiving chamber 7 is a combined valve member and cylinder head 8, desirably consisting ot' a thin disk of phosphor bronze, which disk normally has its edge portions, in a single plane se that4 these edge portions seat itlatwise on the annular seat 3. IVithin the chamber 'TI also dispose a spring 9 continuously bearing aga-inst the rear l iiuid coma cylinrace ot Jthe valve member 8 and desirably engaging the said Ylace along a circle of the same diameter as the bore or" the cylinder 2, er in other words opposite the inner edge of the adjacent end of? the cylinder. For this purpose, I am here showing a spring 9 as tapered to increase its diameter downward and as having its upper end loosely fitting around a Vertical pipe i0 which forms a discharge outlet tor the chamber 7 and which leads through an auxiliary chamber 1l to an outlet pipe l2.

In operation, the lip-stroke or compression stroke ol the piston will cause the fluid (which has previously been admitted to the intake 14) to be compressed Within the cylinder and the resulting pressure will tend to raise the movable head 8 against the pressureof the spring 9. By properly selecting this spring to secure the requisite resistance, I can readily arrange a construction so that the resistance of the spring will not be overcome until the piston is close to the end et its compression stroke. Then the overhalancing of the spring and ot' the rsidual pressure in the chamber 7 bv the pressure of the compressed tluid will lift the head 8 bodily, thereby permitting the highly comspring'will again seat the disk 8 and the 'ensuing downward or intake stroke et the inln t i S into the cylinder and the resulting downward converting elt the disk will rook the extreme edges et the latter upwardl y' as shown in lig'. That is to sa". the e' reine inner edges of the scat Il will resist the conrexing and will he continuouslyv in firm engagement wi'lh the disk during; downward or intake stroke ol the pisimi` l\!lean\\'liile. he discharge oi' [luid from the chamber thro A the tube lll and the outlet duct l2 reduces the pressure in the chamber and when the piston opens the inletV ll; und admits a ilresh charge of fluid to the i^ \'linder the partial vacuum in the cylinder is overcome and the resiliency et the valve disk restores it to its normal shape :is showi in Fig. l, so that the disk bears with its edge portion tlatwise on the seat 3. In przu'tice. the rocking oi.2 the valve disk on the inner edge of the seat 3 affords a slight scraping action, thereby keeping the parte el fau and rubbing off any particles ei dust or the like. so that these will not tend to settle between the disk and its seat. To avoid undue con-- veXing of the disk during its flexing. de sirably restrict this honing substuut.: lly lo the outer edge portion of the disk.r tlm heini readily accomililished by giving the middle portion of the disk a permanent upward curvature after the manner shown Vin l'ligs. l and 2.

Owing to the large diameter el tlu` evliuw `der compared with that ell the inlet tor the si ne. a slight litt-ing eff the f'ylindcr head will uli'ord an ample opening 'for thi` speedy dischang;`i j t' the compri ed lluid. Consequently. my eenstriution well operato ht li ttiug oi' the tylor Ye n eher7 so thuf/ with :i cillalimf pistou. the mliwler luud to the small entr-ut nl' this morenier-t sul 1o the liehtresvr uw," the llcffihlw metal disk uitublc tor the purpose. the bam mering noise in, with older' conslrlu-,tions employing ium'al'ile c \f'linder heads is o tively avoided. and in practice the thin iilin oiI oil which terms on the .seul 3 deudens these minute blows so that in v consi rurtiou `s entirely noiseless.

The oil just mentioned iss-gradually inrried out ot' the cylinder with the compressed Fluid,l being seine of the 1`1liricatiug oil which is required tor maintaining the durability ot the piston and cyliiuler. rlhis oil tends to aecumulate'in the chan'ibcr T and ilE freely allowed to do so might seriously clou` other portions of the reti mating mechanism. To avoid this, I do not connect the chamber 7 directly to the discharge outlet 1Q or even to the auxiliary chamber l1 from which this i i. 4: not?. in oi. l

ieiglit to close the en lui'tlieif i'oi'eino oi will tend to e oil und is the oei'n its the s disk, 1:

i tlii i :i eeel'i 'the amount o oil tl'iiis diselini'get spurt een lie finite email.

lilofeveix, efliile lieve illustrated end deg scribed :in eiiiliodiniefit .it my invention ineludinfi' eeiftsin dei, i'nlile iiintnies oli Conetiuotion and eiiengeinent suoli es the einiloyinent of tlie pipe lO tot n two-told pim pose and the sliepinp; et the volvo disk with e single centi-ai deine. if do not eisli :to loe limited to `these oi" file/teils oi the dis closed iiiinngrenienn 'i' beine' obvious that the sani-e niigglit lie nlodi .d .i i 'iv irfnys Witliout depei'iii' iiioni the spil' oil" my inven tion oiiiion'i tlie ipponfled eleiin ample, instead oit' enplojl'fingj Wziiw'll),T dii'eetod ,nti'el deine shone for eli- {eotiveli,VT lii.n no; the flexing oi the Valve disk to ite i ,dii'illif oiitfi'eifd noition, l may provide this diei with e series of iinmilei" eori'nojetions :i'iteif the nninnei' shown in lling. L So also7 l do not Wish to lie limited to any psntieuleii n'iatei'iel 'toi' the ire-ive disk, noi` to :i pzifii'frieiilzii' ebene oi spi'iinge although l pifefeiielilv i'ni'ik-i the doe'i'iwni'd end of the spii liesii freinet ii-lio vulve disk in snbstent ll eline: Lent witli, the lioi'e oit the cylindeirlllins disposed the nessnie of the spring; lies no eil-eet en tlie Coi oonifex'in; oilr t-lio disk o' :lie si'iiiill tens' in i'ediiiied 'Voipositively :ind iiiiiiidijf/ ien-Linn" t e volvo disk Wlien the pressures on opposite Atenes oi? the dii-k eine sidi" :iiitielljvodiiel. llllitlioiit tlies iptlie sentinel' ol" the valve ni" it lie too :now to 11e-- repond to :i eapid domnwziidV n'ioveinent ofi tlie pistoni tl'ieioliy iliwn'iitting some oil' the compresse-fl duid to lie smoked boek into the cylinder, Wliio'li is eliiev'liifely prevented by nee of the sniing.

Noi? do l'. Wish to be limited t@ the use o't my olieok vulve in oonneioion with e Huid Compressor or no iti-i 'onble iiinetion oil o vulve nie-,inner :ind :i Cylinder lien d.

l cleiin es my invention:

'1. cheek veilve comprising n Het un nnlni seat, e ilexible disk having its edge portion oveiliinging` the sent, and spring'- piessed ineens messing against the disk on the ieee opposite the sent along :i circle coef/Jini with end smaller in dionieteif than the bore of the sezit Wlieeby to iuloifuin the feninpj or inoiid only needs to be Alf oi tlie sont to i .,5 ALoi'1n toiietziidin' the f oi? tlie portion thereof ie. ,ieily ii l oi.2 'Elio seiiil liuleiuin eiielo.

clieol; valve comprising zi iiat en niilei @een e ',dexilole disk lie-ving its edgie poi-1i uL oveiilninging the sent9 end sijninlij pref-reed ineens jii'eesing against tlie disk on the ''iico opposite the sent and. ziiifzinn'ed 'tot iinleifnniingg` tlie disk upon the innert' edge o 'the sei; to (tense si convening Henin-e of tlie disk wlien sented., tlie disk having); its oeniii-iii portion ziiolied to Teterd tlie ile-XinJ tlieieol.

A. cheek valve ioi e compresso-i oi the j ooini'iiising` e easing heaving en ennolsii fiat sent tlieiceinj e flexible disk hei/ing its edge poition ovei'lieingine' the seid sent, spiiing inea-ns urging tlie disk egninst the sent, and en outlet duet having its inlet iiiiftliin the casing; on the opposite side ott the disk iioin the sent ind Close to the disk to liinit the tinpjriing ot oil Within the easing' on the seid opposite side oit iilie disk.

li. A. check valve foi' e oonipressoi oi the like, comprising zi Gesine; having); en :innoler Het seat tliei'eim :i 'flexible disk liiiving its edge portion oveilizingintg` the seid seat., spiing ineens urging' the disk against the sont, 'and sin outlet duet having its inlet Within the Casing; on the opposite side oit the disk ioin tlie seat eind close to the disk to limit the trapping o'll oil Within the @rising on tlie said opposite side of the disk. the outlet duet serving also to limit tlie bodily movement of tlie (liek away iii'oni the seat.

il olieek Valve for ai eoinpiessoi or the like, Comprising' n cosine' having e Het see't in one Well tlieieoit end having e perifere,- tion in i Well opposed tlieieto, :i Flexible disk. disposed Within the easing; and bovino; Vits edge poition normally in engagement with tlie sezift, en outlet duet Conner-ted io tlie peiiioi'zitioii in tlie second named Well ind extending' olose to tlie disk to lilnit the ti'eppinp; oi? oil `within the easing? end e spiiiil Compression spring bearing; et one end against tlie disk and e'en'teied et its otliei'l end by engagement with the outlet duet.

6. .d elieok valve toi :i eoinniessoin oi' the like/ comprising; n easing; liming; a, 'dat seat in one Well tloeieo't end linvingi e, periioiiition in :i will onnosed theieto, e flexible disk disposed Witliin the easing; end having; its edge portion noinielli7 in engagement with tlio sent, zin. outlet dnot eonneeted to 'tlie perforation in tlie second nrimed Weill tween the disk sind tlie second named Wall,

lilo

the out-lef duct beingl coaxial with the seat and being engaged by the spring adjacent to the second named wall to center the spring.

7. In zin siii' compressor or the like7k :i cylinder open at its discharge end, a oep of larger bore fghan the cylinder secured directly o the said end of the cylinder in alineinent therewith so that ihe said end of the 10 cylinder affords an annular seat directed lowziirls the bore oi" the cup, the cui having :in integral partition within iti parallel to the said seat, :i Het (lisk having' ils edge portion normally bearing` againstizlie sont, and 2i compression spring disposed within the mp and operatively interposed between the disk and the said partition.

Signed at Chicago, Illinois, August 16th. 1921.

JOHN TVARDOVSK Y. 

